Features of the M15-A4: The M15A Tactical Carbine sports a metal barrel that is one piece, a removable carry handle, high capacity magazine, engraved receiver, a tougher foregrip, reinforced stock features, and better wiring. The stock can be converted from full to retractable using an M15 Crane Stock

One of the improvement from the previous versions is the fire select switch. It has a nice tight fit and clicks into place nicely. The marker of the switch on the other side of the receiver, however, does not turn since there is no way to make the switch go through the gearbox.

Unlike the TM Armalite replicas, there is a fake handle just below the carry handle which is just for decoration much like the marker of the fire switch mentioned above. It does not release the dust cover where the hopup is located in this case.

At the front of the Classic Army M15 A4 airsoft rifle, the barrel has a nice jetblack, powdercoated look to it. Much like the real M15s. The flash hider is removalble to reveal the 14mm threading for accessory fitment.

The front mount features a side mounted sling loop, which is more useful than the underbarrel mounts. Also found underneath the sight are the bayonet lugs, where it is used for bipods. The front side can be placed on the other side of the of the barrel if needed. Simply push out the securing pins then remove and refit the unit.

If the sight becomes loose, there is a small allen key threaded bolt located under the front sight. Tighten it if needed.

On this CA-M15 A4, with the exception of the Tactical Carbine version, the ring that is slid back to remove the foregrip is now much tougher to move. Unlike the old CA models and some TM's, the new foregrip rings are held on by springs that takes much more strength to move. It is suggested to get the M4/16 foregrip tool for those who would like to store the battery inside the foregrip as this will ease up the process.

For those who do not have the M4/16 tool, the process is still possible. The ring can be pushed down by hand to remove the grips. Refitting can also be done the same way. First, place the stock on a flat surface. With the barrel pointing vertically upwards, step over the rifle and place both hands around the ring. Using the body weight, press down on the ring carefully to remove the grips.

Towards the back of the carry handle is where the rear sights are fitted. It has both the smaller and larger hole. The larger hole is less accurate, although it allows more light to get through taking easier snap shots of the target. The smaller hole is a bit harder to see through but offers more accurate shots. Some may prefer the larger hole for it offers better visibility even with the tradeoff of having a lesser accuracy.

The carry handle is easily removed. It is placed in by a clamp with two screws putting it in place. If it is found to be hard to remove, use a large flathead screwdriver to unscrew. Be careful while uscrewing the carry handle off for any careless turn may damage the threading of the screws.

Looking inside the mag well of this Classic Army M15 A4 Airsoft Gun , the bottom of the gearbox is visible with the reinforced hop unit and the metal nozzle.

The grip looks very similar to those found on any other M4/16 grip. Although with the Classic Army version, a heat sink style grip is added. This feature plays a good role during hot days or when the AEG is running on higher voltage batteries such as a 9.6 V 1200 mAH Ni-MH battery

The motor tightening bolt is large and is accessible enough. However, there is no need to open this part unless during the internal upgrade, which is unlikely. Also, it is good to know that it has a motor tightening bolt instead of an allen wrench bolt that the TM model uses. Therefore, it can easily be loosened and undone when needed.

The CA-M15 A4 has a sleek rear stock where the power source is stored inside. In the real version, this is used as a tool storage feature. To fit the battery first take the wire out and connect the batteries. Then, slide the battery rear end first. After, tuck the wires inside and close the stock. The rear sling loop is located owards the bottom. This is where the tactical sling is threaded through so that the AEG can be carried through the shoulders. It is weird that the front sling loop is attached on the side of the gun, but this is how the CA-M15 A4 rifles are designed.